direct sampling added to rtl_tcp

README

@@ -4,3 +4,9 @@ turns your Realtek RTL2832 based DVB dongle into a SDR receiver
 
 For more information see:
 https://osmocom.org/projects/rtl-sdr/wiki
+
+Modified RTL-SDR Blog Version
+
+1) VCO PLL current fix - Improves stability at frequencies above ~1.5 GHz https://www.rtl-sdr.com/beta-testing-a-modified-rtl-sdr-driver-for-l-band-heat-issues/
+2) RTL_TCP ring buffer enhancement by Stephen Blinick https://www.rtl-sdr.com/significantly-improving-rtl_tcps-performance-with-ring-buffers/
+3) Enabled direct sampling for rtl_tcp

build/install_manifest.txt

@@ -0,0 +1,15 @@
+/etc/udev/rules.d/rtl-sdr.rules
+/usr/local/lib/pkgconfig/librtlsdr.pc
+/usr/local/include/rtl-sdr.h
+/usr/local/include/rtl-sdr_export.h
+/usr/local/lib/librtlsdr.so.0.6git
+/usr/local/lib/librtlsdr.so.0
+/usr/local/lib/librtlsdr.so
+/usr/local/lib/librtlsdr.a
+/usr/local/bin/rtl_sdr
+/usr/local/bin/rtl_tcp
+/usr/local/bin/rtl_test
+/usr/local/bin/rtl_fm
+/usr/local/bin/rtl_eeprom
+/usr/local/bin/rtl_adsb
+/usr/local/bin/rtl_power

build/src/librtlsdr.so

@@ -0,0 +1 @@
+librtlsdr.so.0

build/src/librtlsdr.so.0

@@ -0,0 +1 @@
+librtlsdr.so.0.6git

src/rtl_power.c

@@ -913,7 +913,7 @@ int main(int argc, char **argv)
 #endif
 
 	if (direct_sampling) {
-		verbose_direct_sampling(dev, 1);
+		verbose_direct_sampling(dev, 2);
 	}
 
 	if (offset_tuning) {

src/rtl_tcp.c

@@ -98,7 +98,8 @@ void usage(void)
 		"\t[-n max number of linked list buffers to keep (default: 500)]\n"
 		"\t[-d device index (default: 0)]\n"
 		"\t[-P ppm_error (default: 0)]\n"
-		"\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n");
+		"\t[-T enable bias-T on GPIO PIN 0 (works for rtl-sdr.com v3 dongles)]\n"
+		"\t[-D enable direct sampling (default: off)]\n");
 	exit(1);
 }
 
@@ -374,6 +375,7 @@ int main(int argc, char **argv)
 	int dev_given = 0;
 	int gain = 0;
 	int ppm_error = 0;
+	int direct_sampling = 0;
 	struct llist *curelem,*prev;
 	pthread_attr_t attr;
 	void *status;
@@ -391,7 +393,7 @@ int main(int argc, char **argv)
 	struct sigaction sigact, sigign;
 #endif
 
-	while ((opt = getopt(argc, argv, "a:p:f:g:s:b:d:P:T")) != -1) {
+	while ((opt = getopt(argc, argv, "a:p:f:g:s:b:d:P:T:D")) != -1) {
 		switch (opt) {
 		case 'd':
 			dev_index = verbose_device_search(optarg);
@@ -421,6 +423,9 @@ int main(int argc, char **argv)
 		case 'T':
 			enable_biastee = 1;
 			break;
+		case 'D':
+			direct_sampling = 1;
+			break;
 		default:
 			usage();
 			break;
@@ -457,6 +462,11 @@ int main(int argc, char **argv)
 	SetConsoleCtrlHandler( (PHANDLER_ROUTINE) sighandler, TRUE );
 #endif
 
+	/* Set direct sampling */
+        if (direct_sampling) {
+                verbose_direct_sampling(dev, 2);
+        }
+
 	/* Set the tuner error */
 	verbose_ppm_set(dev, ppm_error);